I don't have huge issues with light sensitivities, and I'm not sure that they are really that much different to those experienced by NTs. For me the main sensory issue is sensitivity to sound.
If I'm out in the sun for too long, I get a headache and I sometimes feel sleepy. I always thought my headaches to be due to dehydration, but after reading threads about light sensitivity, I realise that they could be due to exposure to sunlight. I squint a lot, and need to shade myself from the sun. Cloudy days are not a problem.
I don't like artificial light, and like natural sunlight to come into the house. I don't like sitting in the house with the curtains drawn because I can't see out and the house is way too dark to read. Many people in this country close all the curtains and then sit in the house during the day with artificial lighting. That never made any sense to me. Dull winter days make me feel depressed.
I need pitch black darkness to be able to sleep. Even the landing light needs to be switched off because it shines through the crack in the door frame, and I can't tolerate stanby nd pilot lights on electrical devices. These need sto be covered up or switch up. I need to use shutters and blackout curtains.
I don't like flickering or flashing lights and can't bear to watch a movie or the TV with the lights off. Also, entering a supermarket with at night is a problem. The brightness all hits me at once and it feels really strange, as if not in reality, it's hard to describe.
I can't stand bright unshaded flourescent lights, especially the white ones. We had a flourescent strip light installed in the kitchen and I never ever used it, I hate it. For me they hum, but they don't flicker, though I remember flickering lights when I was at school, perhaps I'm less sensitive now. Old TVs flicker, and that drives me mad.